EP3452646B1 - Commercial vehicle tyre - Google Patents

Commercial vehicle tyre Download PDF

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Publication number
EP3452646B1
EP3452646B1 EP17706232.0A EP17706232A EP3452646B1 EP 3452646 B1 EP3452646 B1 EP 3452646B1 EP 17706232 A EP17706232 A EP 17706232A EP 3452646 B1 EP3452646 B1 EP 3452646B1
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EP
European Patent Office
Prior art keywords
filaments
diameter
commercial vehicle
ply
steel cords
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17706232.0A
Other languages
German (de)
French (fr)
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EP3452646A1 (en
Inventor
Volkmar Fries
Martijn Oosterbaan
Michael Schunack
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Continental Reifen Deutschland GmbH
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Continental Reifen Deutschland GmbH
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Publication date
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Priority to PL17706232T priority Critical patent/PL3452646T3/en
Publication of EP3452646A1 publication Critical patent/EP3452646A1/en
Application granted granted Critical
Publication of EP3452646B1 publication Critical patent/EP3452646B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/0007—Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/48—Tyre cords
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/062—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the strand configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/02—Carcasses
    • B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
    • B60C2009/0416—Physical properties or dimensions of the carcass cords
    • B60C2009/0425—Diameters of the cords; Linear density thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/02—Carcasses
    • B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
    • B60C2009/0416—Physical properties or dimensions of the carcass cords
    • B60C2009/045—Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/02—Carcasses
    • B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
    • B60C2009/0416—Physical properties or dimensions of the carcass cords
    • B60C2009/0466—Twist structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C2200/00—Tyres specially adapted for particular applications
    • B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/2006—Wires or filaments characterised by a value or range of the dimension given
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/202—Strands characterised by a value or range of the dimension given
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2024—Strands twisted
    • D07B2201/2025—Strands twisted characterised by a value or range of the pitch parameter given
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2041—Strands characterised by the materials used
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2051—Cores characterised by a value or range of the dimension given
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2052—Cores characterised by their structure
    • D07B2201/2059—Cores characterised by their structure comprising wires
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2047—Cores
    • D07B2201/2066—Cores characterised by the materials used
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3021—Metals
    • D07B2205/3025—Steel
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2046—Tire cords
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/02—Reinforcing materials; Prepregs
    • D10B2505/022—Reinforcing materials; Prepregs for tyres

Definitions

  • the invention relates to a commercial vehicle tire of radial design with a cross-sectional height of 135 mm to 200 mm, a load index of 121 to 154, with a radial carcass with at least one carcass ply made of steel cords embedded in rubber and with bead areas with bead cores and core profiles around which the carcass ply forms flaps runs.
  • the Steel filaments have a tensile strength in the NT range of 2700 N / mm 2 to 3050 N / mm 2 and are arranged in the tire zenith with 30 to 45 epdm.
  • these steel cords give the carcass ply good strength properties, they have the disadvantage that when the finished green tire is molded into the vulcanization mold, the steel cords can be pushed through the inner layer in the shoulder areas of the tire.
  • a commercial vehicle tire which is a light truck tire, is from the US 6 719 030 B2 known.
  • the carcasses are circulated directly around the bead cores to the single-layer carcass ply, so that no core profiles are provided radially outside the bead cores.
  • Steel cords of various constructions are mentioned for use as strength members in the carcass ply, including construction 1 + 6, the filaments having a tensile strength of at least 2500 N / mm 2 and their diameter 0.15 mm to 0.30 mm, preferably 0 , 17 mm to 0.22 mm.
  • a pneumatic vehicle tire with one or more carcass plies made of steel cords embedded in rubber is also known.
  • the steel cords of the carcass plies consist of a large number of filaments made of fine drawn steel wire and have a diameter of 0.10 mm to 0.45 mm and a tensile strength of 2000 x D + 4400 MPa, where D is the diameter of the filaments in mm.
  • the construction of the cords intended for the carcass ply is selected from a large number of possible constructions.
  • the diameter of the filaments of the steel cords is preferably 0.14 mm to 0.43 mm, in particular 0.18 mm to 0.38 mm.
  • the DE 10 2010 000 050 A1 discloses a steel cord which is suitable as a strength member for a pneumatic vehicle tire.
  • the steel cord consists of an inner layer of at least one core filament with a tensile strength of 3200 N / mm 2 to 3500 N / mm 2 and of at least one layer of enveloping filaments with a tensile strength greater than 3800 N / mm 2 .
  • Such a steel cord is said to have high fatigue resistance.
  • the WO 2011/082844 A1 relates to a pneumatic vehicle tire with at least two belt layers and a single or multi-layer belt bandage.
  • Each belt layer contains steel reinforcements and, given a given elongation of 1% in the direction of the longitudinal extension of the reinforcements, has a tension ⁇ 17,500 N per dm width.
  • the strength members of the belt layers run at an angle of 18 ° to 45 ° to the circumferential direction.
  • the belt bandage contains reinforcements made of a non-metallic material, with the belt bandage having a predetermined stretch of 1% and a tension of less than 2000 N per dm width.
  • the invention is based on the object of executing a commercial vehicle tire of the type mentioned in such a way that the carcass ply is reinforced with steel cords with good strength properties in such a way that the steel cords are pressed through the Shoulder areas of the tire no longer takes place when molded into the tire vulcanization mold.
  • the carcass ply is reinforced with steel cords of construction 1 + 6, the core filament having a diameter of 0.19 mm to 0.22 mm and the ply filaments corresponding diameters from 0.17 mm to 0, 20 mm, the diameter of the ply filaments being at least 0.01 mm smaller than the diameter of the core filament and the steel cords being arranged in the carcass ply in the tire zenith at 60 epdm to 75 epdm.
  • the diameter of the layer filaments is at least 0.02 mm smaller than the diameter of the core filament.
  • the filaments can therefore consist of steel of the strength classes NT, HT or SHT.
  • a design of the filaments with a tensile strength of at least 3200 N / mm 2 is particularly preferred.
  • the layer filaments are twisted about the core filament with a lay length of 10.0 mm to 14.0 mm, in particular of 12.5 mm.
  • a steel cord construction in which the core filament has a diameter of 0.20 mm and the layer filaments each have a diameter of 0.175 mm.
  • the use of such steel cords, together with an arrangement at certain mutual distances, is particularly well suited for preventing the steel cords from being pushed through in the shoulder regions of the tire when molded into the tire vulcanization mold.
  • FIG. 1 schematically shows a cross section of an embodiment variant of a steel cord provided for a carcass ply of a commercial vehicle tire.
  • a commercial vehicle tire designed according to the invention is a radial-type commercial vehicle tire with a cross-sectional height of 135 mm to 200 mm and a load index of 121 to 154.
  • the commercial vehicle tire has the usual components, such as a profiled tread, a multi-layer belt assembly, in particular reinforced with steel cords, an inner layer , Bead areas with bead cores and core profiles and a radial carcass made of at least one carcass ply reinforced with steel cords.
  • the steel cords of the carcass ply run in the side walls in the radial direction, radially inside the tread and the belt in the axial direction.
  • Fig. 1 shows a cross section of a steel cord particularly suitable for use in the carcass ply of commercial vehicle tires according to the invention, which has construction 1 + 6 and accordingly a single core filament 1 and six with the same Layer filaments 2 in contact on the outside.
  • the layer filaments 2 are twisted in a manner known per se in the S or Z direction around the core filament 1 with a lay length of 10.0 mm to 14.0 mm, preferably of about 12.5 mm.
  • the core filament 1 and the layer filaments 2 consist of steel of the strength classes NT (normal tensile), HT (high tensile) or SHT (super high tensile).
  • Steel filaments of strength class NT have a tensile strength of 2700 N / mm 2 to 3050 N / mm 2
  • steel filaments of strength class HT have a tensile strength of 3050 N / mm 2 to 3330 N / mm 2
  • steel filaments of strength class SHT have a tensile strength of 3350 N / mm 2 to 3650 N / mm 2 .
  • the filaments 1, 2 have a tensile strength of at least 3200 N / mm 2 .
  • the core filament 1 and the layer filaments 2 each have an essentially circular cross section.
  • the core filament 1 has a diameter d 1 of 0.19 mm to 0.22 mm, preferably of 0.20 mm.
  • All layer filaments 2 have matching diameters d 2 of 0.17 mm to 0.20 mm, in particular 0.175 mm, the diameter d 2 of the layer filaments 2 being smaller by at least 0.01 mm, preferably by at least 0.02 mm is as the diameter d 1 of the core filament 1.
  • the steel cord has a core filament 1 with a diameter d 1 of 0.20 mm and six ply filaments 2 with a diameter d 2 of 0.175 mm.
  • the steel cords are embedded by calendering in one of the customary rubber compounds, the number of steel cords being 90 epdm to 120 epdm (ends per decimeter) in the unvulcanized calendered carcass ply.
  • the number of steel cords in the tire zenith or along the equatorial plane of the tire is, depending on the tire dimension, 60 epdm to 75 epdm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Tires In General (AREA)
  • Ropes Or Cables (AREA)

Description

Die Erfindung betrifft einen Nutzfahrzeugreifen in Radialbauart mit einer Querschnittshöhe von 135 mm bis 200 mm, einem Lastindex von 121 bis 154, mit einer Radialkarkasse mit zumindest einer Karkasslage aus in Gummi eingebetteten Stahlkorden und mit Wulstbereichen mit Wulstkernen und Kernprofilen, um welche die Karkasslage Hochschläge bildend verläuft.The invention relates to a commercial vehicle tire of radial design with a cross-sectional height of 135 mm to 200 mm, a load index of 121 to 154, with a radial carcass with at least one carcass ply made of steel cords embedded in rubber and with bead areas with bead cores and core profiles around which the carcass ply forms flaps runs.

Es ist üblich, in Nutzfahrzeugreifen der eingangs genannten Art = mit einer Querschnittshöhe von 135 mm bis 200 mm und einem Lastindex von 121 bis 154 - die Karkasslage mit Stahlkorden der Konstruktion 3 x 0,20 mm + 9 x 0,175 mm zu verstärken, wobei die Stahlfilamente eine Zugfestigkeit im NT Bereich von 2700 N/mm2 bis 3050 N/mm2 aufweisen und im Reifenzenit mit 30 bis 45 epdm angeordnet sind. Diese Stahlkorde verleihen zwar der Karkasslage gute Festigkeitseigenschaften, haben jedoch den Nachteil, dass beim Einformen des fertig aufgebauten Rohreifens in die Vulkanisationsform in den Schulterbereichen des Reifens ein Durchdrücken der Stahlkorde durch die Innenschicht stattfinden kann.It is common in commercial vehicle tires of the type mentioned at the beginning = with a cross-sectional height of 135 mm to 200 mm and a load index of 121 to 154 - to reinforce the carcass ply with steel cords of the construction 3 x 0.20 mm + 9 x 0.175 mm, the Steel filaments have a tensile strength in the NT range of 2700 N / mm 2 to 3050 N / mm 2 and are arranged in the tire zenith with 30 to 45 epdm. Although these steel cords give the carcass ply good strength properties, they have the disadvantage that when the finished green tire is molded into the vulcanization mold, the steel cords can be pushed through the inner layer in the shoulder areas of the tire.

Ein Nutzfahrzeugreifen, welcher ein Light-Truck-Reifen ist, ist aus der US 6 719 030 B2 bekannt. Bei diesem Reifen sind die Karkasshochschläge die Wulstkerne unmittelbar umlaufend zur einlagig ausgeführten Karkasslage rückgeführt, sodass radial außerhalb der Wulstkerne keine Kernprofile vorgesehen sind. Erwähnt sind zur Verwendung als Festigkeitsträger in der Karkasslage Stahlkorde unterschiedlicher Konstruktionen, unter anderem auch die Konstruktion 1 + 6, wobei die Filamente eine Zugfestigkeit von mindestens 2500 N/mm2 aufweisen und ihr Durchmesser 0,15 mm bis 0,30 mm, vorzugsweise 0,17 mm bis 0,22 mm, betragen kann.A commercial vehicle tire, which is a light truck tire, is from the US 6 719 030 B2 known. In this tire, the carcasses are circulated directly around the bead cores to the single-layer carcass ply, so that no core profiles are provided radially outside the bead cores. Steel cords of various constructions are mentioned for use as strength members in the carcass ply, including construction 1 + 6, the filaments having a tensile strength of at least 2500 N / mm 2 and their diameter 0.15 mm to 0.30 mm, preferably 0 , 17 mm to 0.22 mm.

Aus der DE 297 24 897 U1 ist ferner ein Fahrzeugluftreifen mit einer oder mehreren Karkasslagen aus in Gummi eingebetteten Stahlkorden bekannt. Die Stahlkorde der Karkasslagen bestehen aus einer Vielzahl von Filamenten aus feingezogenem Stahldraht und weisen einen Durchmesser von 0,10 mm bis 0,45 mm sowie eine Zugfestigkeit von 2000 x D + 4400 MPa auf, wobei D der Durchmesser der Filamente in mm ist. Die Konstruktion der für die Karkasslage vorgesehenen Korde ist aus einer Vielzahl von möglichen Konstruktionen gewählt. Der Durchmesser der Filamente der Stahlkorde beträgt bevorzugt 0,14 mm bis 0,43 mm, insbesondere 0,18 mm bis 0,38 mm. In der Karkasslage sind die Stahlkorde am Ort der maximalen Reifenbreite mit 3 bis 8 Enden pro cm (epc) (= 30 epdm bis 80 epdm), bevorzugt mit 4 epc bis 7 epc (40 epdm bis 70 epdm), angeordnet.From the DE 297 24 897 U1 A pneumatic vehicle tire with one or more carcass plies made of steel cords embedded in rubber is also known. The steel cords of the carcass plies consist of a large number of filaments made of fine drawn steel wire and have a diameter of 0.10 mm to 0.45 mm and a tensile strength of 2000 x D + 4400 MPa, where D is the diameter of the filaments in mm. The construction of the cords intended for the carcass ply is selected from a large number of possible constructions. The diameter of the filaments of the steel cords is preferably 0.14 mm to 0.43 mm, in particular 0.18 mm to 0.38 mm. In the carcass ply, the steel cords are arranged at the location of the maximum tire width with 3 to 8 ends per cm (epc) (= 30 epdm to 80 epdm), preferably with 4 epc to 7 epc (40 epdm to 70 epdm).

Die DE 10 2010 000 050 A1 offenbart einen Stahlkord, welcher als Festigkeitsträger für einen Fahrzeugluftreifen geeignet ist. Der Stahlkord besteht aus einer inneren Lage aus mindestens einem Kernfilament mit einer Zugfestigkeit von 3200 N/mm2 bis 3500 N/mm2 und aus mindestens einer Lage von umhüllenden Filamenten mit einer Zugfestigkeit größer 3800 N/mm2. Ein derartiger Stahlkord soll eine hohe Ermüdungsbeständigkeit aufweisen.The DE 10 2010 000 050 A1 discloses a steel cord which is suitable as a strength member for a pneumatic vehicle tire. The steel cord consists of an inner layer of at least one core filament with a tensile strength of 3200 N / mm 2 to 3500 N / mm 2 and of at least one layer of enveloping filaments with a tensile strength greater than 3800 N / mm 2 . Such a steel cord is said to have high fatigue resistance.

Die WO 2011/082844 A1 betrifft einen Fahrzeugluftreifen mit zumindest zwei Gürtellagen und einer ein- oder mehrlagigen Gürtelbandage. Jede Gürtellage enthält Festigkeitsträger aus Stahl und weist bei vorgegebener Dehnung um 1% in Richtung der Längserstreckung der Festigkeitsträger eine Spannung < 17.500 N per dm Breite auf. Die Festigkeitsträger der Gürtellagen verlaufen unter einem Winkel von 18° bis 45° zur Umfangsrichtung. Die Gürtelbandage enthält Festigkeitsträger aus einem nicht-metallischen Werkstoff, wobei die Gürtelbandage bei vorgegebener Dehnung um 1% eine Spannung kleiner 2000 N per dm Breite aufweist.The WO 2011/082844 A1 relates to a pneumatic vehicle tire with at least two belt layers and a single or multi-layer belt bandage. Each belt layer contains steel reinforcements and, given a given elongation of 1% in the direction of the longitudinal extension of the reinforcements, has a tension <17,500 N per dm width. The strength members of the belt layers run at an angle of 18 ° to 45 ° to the circumferential direction. The belt bandage contains reinforcements made of a non-metallic material, with the belt bandage having a predetermined stretch of 1% and a tension of less than 2000 N per dm width.

Der Erfindung liegt die Aufgabe zugrunde, einen Nutzfahrzeugreifen der eingangs genannten Art derart auszuführen, dass die Karkasslage bei guten Festigkeitseigenschaften mit Stahlkorden derart verstärkt ist, dass ein Durchdrücken der Stahlkorde in den Schulterbereichen des Reifens beim Einformen in die Reifenvulkanisationsform nicht mehr stattfindet.The invention is based on the object of executing a commercial vehicle tire of the type mentioned in such a way that the carcass ply is reinforced with steel cords with good strength properties in such a way that the steel cords are pressed through the Shoulder areas of the tire no longer takes place when molded into the tire vulcanization mold.

Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Karkasslage mit Stahlkorden der Konstruktion 1 + 6 verstärkt ist, wobei das Kernfilament einen Durchmesser von 0,19 mm bis 0,22 mm aufweist und die Lagenfilamente übereinstimmende Durchmesser von 0,17 mm bis 0,20 mm aufweisen, wobei der Durchmesser der Lagenfilamente um mindestens 0,01 mm kleiner ist als der Durchmesser des Kernfilaments und wobei die Stahlkorde in der Karkasslage im Reifenzenit mit 60 epdm bis 75 epdm angeordnet sind.The object is achieved according to the invention in that the carcass ply is reinforced with steel cords of construction 1 + 6, the core filament having a diameter of 0.19 mm to 0.22 mm and the ply filaments corresponding diameters from 0.17 mm to 0, 20 mm, the diameter of the ply filaments being at least 0.01 mm smaller than the diameter of the core filament and the steel cords being arranged in the carcass ply in the tire zenith at 60 epdm to 75 epdm.

Es hat sich herausgestellt, dass es in einem Nutzfahrzeugreifen mit einer Querschnittshöhe von 135 mm bis 200 mm und einem Lastindex von 121 bis 154 für gute Festigkeitseigenschaften der Karkasslage(n) besonders vorteilhaft ist, 1 + 6 Stahlkorde mit Filamenten, die Durchmesser in den erwähnten Bereichen aufweisen, einzusetzen. Besonders vorteilhaft ist die gemäß der Erfindung vorgenommene Abstimmung der eingesetzten Stahlkorde an ihren gegenseitigen Abstand in der Karkasslage. Im Rohreifen ist der gegenseitige Abstand der Stahlkorde geringer als im vulkanisierten Reifen, was, zusätzlich zur speziellen Konstruktion der Stahlkorde, dazu beiträgt, dass ein Durchdrücken der Stahlkorde in den Schulterbereichen des Reifens beim Einformen in die Reifenvulkanisationsform vermieden wird. Darüber hinaus hat sich herausgestellt, dass gemäß der Erfindung ausgeführte Nutzfahrzeugreifen im Gürtel/Laufstreifenbereich eine höhere Durchstichfestigkeit aufweisen als bekannte Ausführungen.It has been found that in a commercial vehicle tire with a cross-sectional height of 135 mm to 200 mm and a load index of 121 to 154, it is particularly advantageous for good strength properties of the carcass ply (s), 1 + 6 steel cords with filaments that have diameters in those mentioned Have areas to use. The adjustment of the steel cords used according to the invention to their mutual spacing in the carcass ply is particularly advantageous. In the green tire, the mutual distance of the steel cords is smaller than in the vulcanized tire, which, in addition to the special construction of the steel cords, helps to prevent the steel cords from being pushed through in the shoulder regions of the tire when they are molded into the tire vulcanization mold. In addition, it has been found that commercial vehicle tires designed according to the invention have a higher puncture resistance in the belt / tread area than known designs.

Bei einer bevorzugten Ausführungsform der Erfindung ist der Durchmesser der Lagenfilamente um mindestens 0,02 mm kleiner als der Durchmesser des Kernfilaments. Je nach der Dimension des Nutzfahrzeugreifens und dem Lastindex ist es vorteilhaft, Stahlfilamente bestimmter Festigkeitsklassen zu verwenden. Die Filamente können daher aus Stahl der Festigkeitsklassen NT, HT oder SHT bestehen. Besonders bevorzugt ist eine Ausführung der Filamente mit einer Zugfestigkeit von mindestens 3200 N/mm2.In a preferred embodiment of the invention, the diameter of the layer filaments is at least 0.02 mm smaller than the diameter of the core filament. Depending on the dimension of the commercial vehicle tire and the load index, it is advantageous to use steel filaments of certain strength classes. The filaments can therefore consist of steel of the strength classes NT, HT or SHT. A design of the filaments with a tensile strength of at least 3200 N / mm 2 is particularly preferred.

Bevorzugt ist ferner eine Ausführung, bei der die Lagenfilamente mit einer Schlaglänge von 10,0 mm bis 14,0 mm, insbesondere von 12,5 mm, um das Kernfilament verdreht sind.Also preferred is an embodiment in which the layer filaments are twisted about the core filament with a lay length of 10.0 mm to 14.0 mm, in particular of 12.5 mm.

Bevorzugt ist ferner eine Stahlkordkonstruktion, bei der das Kernfilament einen Durchmesser von 0,20 mm aufweist und die Lagenfilamente jeweils einen Durchmesser von 0,175 mm aufweisen. Gerade die Verwendung solcher Stahlkorde ist gemeinsam mit einer Anordnung unter bestimmten gegenseitigen Abständen besonders gut dafür geeignet, ein Durchdrücken der Stahlkorde in den Schulterbereichen des Reifens beim Einformen in die Reifenvulkanisationsform zu verhindern.Also preferred is a steel cord construction in which the core filament has a diameter of 0.20 mm and the layer filaments each have a diameter of 0.175 mm. The use of such steel cords, together with an arrangement at certain mutual distances, is particularly well suited for preventing the steel cords from being pushed through in the shoulder regions of the tire when molded into the tire vulcanization mold.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung werden nun anhand der einzigen Figur, Fig. 1, welche schematisch einen Querschnitt einer Ausführungsvariante eines für eine Karkasslage eines Nutzfahrzeugreifens vorgesehenen Stahlkordes zeigt, näher beschrieben.Further features, advantages and details of the invention will now be described with reference to the single figure, Fig. 1 , which schematically shows a cross section of an embodiment variant of a steel cord provided for a carcass ply of a commercial vehicle tire.

Ein erfindungsgemäß ausgeführter Nutzfahrzeugreifen ist ein Nutzfahrzeugreifen in Radialbauart mit einer Querschnittshöhe von 135 mm bis 200 mm und einem Lastindex von 121 bis 154. Der Nutzfahrzeugreifen weist die üblichen Bauteile auf, wie einen profilierten Laufstreifen, einen mehrlagigen, insbesondere mit Stahlkorden verstärkten Gürtelverband, eine Innenschicht, Wulstbereiche mit Wulstkernen und Kernprofilen sowie eine Radialkarkasse aus zumindest einer mit Stahlkorden verstärkten Karkasslage. Die Stahlkorde der Karkasslage verlaufen in den Seitenwänden in radialer Richtung, radial innerhalb des Laufstreifens und des Gürtels in axialer Richtung.A commercial vehicle tire designed according to the invention is a radial-type commercial vehicle tire with a cross-sectional height of 135 mm to 200 mm and a load index of 121 to 154. The commercial vehicle tire has the usual components, such as a profiled tread, a multi-layer belt assembly, in particular reinforced with steel cords, an inner layer , Bead areas with bead cores and core profiles and a radial carcass made of at least one carcass ply reinforced with steel cords. The steel cords of the carcass ply run in the side walls in the radial direction, radially inside the tread and the belt in the axial direction.

Fig. 1 zeigt einen Querschnitt eines zum Einsatz in der Karkasslage erfindungsgemäß ausgeführter Nutzfahrzeugreifen besonders geeigneten Stahlkordes, welcher die Konstruktion 1 + 6 und dementsprechend ein einziges Kernfilament 1 und sechs mit dessen Außenseite in Kontakt stehende Lagenfilamenten 2 aufweist. Die Lagenfilamente 2 sind in an sich bekannter Weise in S- oder Z-Richtung um das Kernfilament 1 mit einer Schlaglänge von 10,0 mm bis 14,0 mm, vorzugsweise von etwa 12,5 mm, verdrillt. Fig. 1 shows a cross section of a steel cord particularly suitable for use in the carcass ply of commercial vehicle tires according to the invention, which has construction 1 + 6 and accordingly a single core filament 1 and six with the same Layer filaments 2 in contact on the outside. The layer filaments 2 are twisted in a manner known per se in the S or Z direction around the core filament 1 with a lay length of 10.0 mm to 14.0 mm, preferably of about 12.5 mm.

Das Kernfilament 1 und die Lagenfilamente 2 bestehen aus Stahl der Festigkeitsklassen NT (normal tensile), HT (high tensile) oder SHT (super high tensile). Stahlfilamente der Festigkeitsklasse NT weisen eine Zugfestigkeit von 2700 N/mm2 bis 3050 N/mm2, Stahlfilamente der Festigkeitsklasse HT eine Zugfestigkeit von 3050 N/mm2 bis 3330 N/mm2 und Stahlfilamente der Festigkeitsklasse SHT eine Zugfestigkeit von 3350 N/mm2 bis 3650 N/mm2auf. Bei einer bevorzugten Ausführung weisen die Filamente 1, 2 eine Zugfestigkeit von mindestens 3200 N/mm2 auf.The core filament 1 and the layer filaments 2 consist of steel of the strength classes NT (normal tensile), HT (high tensile) or SHT (super high tensile). Steel filaments of strength class NT have a tensile strength of 2700 N / mm 2 to 3050 N / mm 2 , steel filaments of strength class HT have a tensile strength of 3050 N / mm 2 to 3330 N / mm 2 and steel filaments of strength class SHT have a tensile strength of 3350 N / mm 2 to 3650 N / mm 2 . In a preferred embodiment, the filaments 1, 2 have a tensile strength of at least 3200 N / mm 2 .

Das Kernfilament 1 und die Lagenfilamente 2 weisen jeweils einen im Wesentlichen kreisförmigen Querschnitt auf. Das Kernfilament 1 weist einen Durchmesser d1 von 0,19 mm bis 0,22 mm, vorzugsweise von 0,20 mm, auf. Sämtliche Lagenfilamente 2 weisen überstimmende Durchmesser d2 von 0,17 mm bis 0,20 mm, insbesondere von 0,175 mm, auf, wobei der Durchmesser d2 der Lagenfilamente 2 um mindestens 0,01 mm, vorzugsweise um mindestens 0,02 mm, kleiner ist als der Durchmesser d1 des Kernfilaments 1. Bei einer bevorzugten Ausführung weist der Stahlkord ein Kernfilament 1 mit einem Durchmesser d1 von 0,20 mm und sechs Lagenfilamente 2 mit einem Durchmesser d2 von 0,175 mm auf.The core filament 1 and the layer filaments 2 each have an essentially circular cross section. The core filament 1 has a diameter d 1 of 0.19 mm to 0.22 mm, preferably of 0.20 mm. All layer filaments 2 have matching diameters d 2 of 0.17 mm to 0.20 mm, in particular 0.175 mm, the diameter d 2 of the layer filaments 2 being smaller by at least 0.01 mm, preferably by at least 0.02 mm is as the diameter d 1 of the core filament 1. In a preferred embodiment, the steel cord has a core filament 1 with a diameter d 1 of 0.20 mm and six ply filaments 2 with a diameter d 2 of 0.175 mm.

Zur Herstellung einer solche Stahlkorde aufweisenden Karkasslage werden die Stahlkorde durch Kalandrieren in eine der üblichen Gummierungsmischungen eingebettet, wobei in der nicht vulkanisierten kalandrierten Karkasslage die Anzahl der Stahlkorde 90 epdm bis 120 epdm (ends per decimeter) beträgt.To produce a carcass ply of this type, the steel cords are embedded by calendering in one of the customary rubber compounds, the number of steel cords being 90 epdm to 120 epdm (ends per decimeter) in the unvulcanized calendered carcass ply.

Im fertig hergestellten, vulkanisierten Nutzfahrzeugreifen beträgt die Anzahl der Stahlkorde im Reifenzenit bzw. entlang der Äquatorialebene des Reifens, je nach Reifendimension, 60 epdm bis 75 epdm.In the finished, vulcanized commercial vehicle tire, the number of steel cords in the tire zenith or along the equatorial plane of the tire is, depending on the tire dimension, 60 epdm to 75 epdm.

BezugsziffernlisteReference number list

1 .......................1 .......................
KernfilamentCore filament
2 .......................2 .......................
LagenfilamentLayer filament
d1, d2 ................d 1 , d 2 ................
Durchmesserdiameter

Claims (6)

  1. Commercial vehicle tyre of a radial type of construction with a cross-sectional height of 135 mm to 200 mm, a load index of 121 to 154, a radial-ply casing with at least one casing ply comprising steel cords embedded in rubber and with bead regions comprising bead cores and bead fillers, around which the casing ply runs, thereby forming turn-ups,
    characterized in that
    the casing ply is reinforced with steel cords of the construction 1 + 6, wherein the core filament (1) has a diameter (d1) of 0.19 mm to 0.22 mm and the ply filaments (2) have coinciding diameters (d2) of 0.17 mm to 0.20 mm, wherein the diameter (d2) of the ply filaments (2) is less than the diameter (d1) of the core filament (1) by at least 0.01 mm and wherein, at the crown of the tyre, the steel cords are arranged in the casing ply with 60 epdm to 75 epdm.
  2. Commercial vehicle tyre according to Claim 1, characterized in that the diameter (d2) of the ply filaments (2) is less than the diameter (d1) of the core filament (1) by at least 0.02 mm.
  3. Commercial vehicle tyre according to Claim 1 or 2, characterized in that the filaments (1, 2) have a tensile strength of at least 3200 N/mm2.
  4. Commercial vehicle tyre according to one of Claims 1 to 3, characterized in that the ply filaments (2) are twisted around the core filament (1) with a length of lay of 10.0 mm to 14.0 mm.
  5. Commercial vehicle tyre according to Claim 4, characterized in that the length of lay is 12.5 mm.
  6. Commercial vehicle tyre according to one of Claims 1 to 5, characterized in that the core filament (1) has a diameter (d1) of 0.20 mm and the ply filaments (2) have a diameter (d2) of 0.175 mm.
EP17706232.0A 2016-05-03 2017-02-20 Commercial vehicle tyre Active EP3452646B1 (en)

Priority Applications (1)

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PL17706232T PL3452646T3 (en) 2016-05-03 2017-02-20 Commercial vehicle tyre

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DE102016207561.6A DE102016207561A1 (en) 2016-05-03 2016-05-03 Commercial vehicle tires
PCT/EP2017/053754 WO2017190861A1 (en) 2016-05-03 2017-02-20 Commercial vehicle tyre

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EP3452646A1 EP3452646A1 (en) 2019-03-13
EP3452646B1 true EP3452646B1 (en) 2020-04-08

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EP17706232.0A Active EP3452646B1 (en) 2016-05-03 2017-02-20 Commercial vehicle tyre

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US (1) US20190152261A1 (en)
EP (1) EP3452646B1 (en)
CN (1) CN109072499A (en)
BR (1) BR112018072300B1 (en)
DE (1) DE102016207561A1 (en)
ES (1) ES2793393T3 (en)
PL (1) PL3452646T3 (en)
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Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5779829A (en) 1995-08-24 1998-07-14 The Goodyear Tire & Rubber Company Pneumatic tire having a single carcass ply reinforced with metallic cords, a high ending ply, turnup and locked bead construction
DE29724897U1 (en) * 1996-12-17 2005-10-27 The Goodyear Tire & Rubber Co., Akron Pneumatic tyre - has carcass with parallel cords, two side walls paced apart by a distance that determines width of tyre section, two beads around which ends of the cords of the carcass are turned up, etc.
JP4315561B2 (en) * 2000-02-01 2009-08-19 住友ゴム工業株式会社 Pneumatic tire using composite cord
US7017635B2 (en) * 2002-12-27 2006-03-28 The Goodyear Tire & Rubber Company Tire with outside-in ply construction
FR2873721A1 (en) * 2004-08-02 2006-02-03 Michelin Soc Tech LAYERED CABLE FOR PNEUMATIC TOP REINFORCEMENT
FR2938467B1 (en) * 2008-11-17 2010-11-12 Michelin Soc Tech PNEUMATIC COMPRISING CARCASS FRAME CABLES HAVING LOW PERMEABILITY, AND REDUCED RUBBER MELANGE THICKNESSES
FR2954219A1 (en) * 2009-11-17 2011-06-24 Michelin Soc Tech PNEUMATIC COMPRISING CARCASS FRAME CABLES WITH DIFFERENT PERMEABILITIES
DE102010000014A1 (en) * 2010-01-07 2011-07-14 Continental Reifen Deutschland GmbH, 30165 Vehicle tires
DE102010000050A1 (en) * 2010-01-12 2011-07-14 Continental Reifen Deutschland GmbH, 30165 Steel cord for use as strength carrier in e.g. belt ply of passenger car pneumatic tire, has core filament comprising tensile strength ranging between specific values, and coating filaments comprising strength larger than specific value

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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PL3452646T3 (en) 2020-10-19
BR112018072300B1 (en) 2022-08-16
US20190152261A1 (en) 2019-05-23
BR112018072300A2 (en) 2019-02-12
CN109072499A (en) 2018-12-21
DE102016207561A1 (en) 2017-11-09
WO2017190861A1 (en) 2017-11-09
ES2793393T3 (en) 2020-11-13
EP3452646A1 (en) 2019-03-13

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